Application of Block System Isolation Construction to Improve Water Supply Rate

2021 ◽  
Vol 22 (4) ◽  
pp. 291-306
Author(s):  
Young-hoon Jo
Keyword(s):  
Water Supply ◽  
Supply Rate ◽  
Block System

scholarly journals Leakage Pattern Monitoring Method of CEP based Water Supply Block System

2015 ◽  
Vol 8 (27) ◽  
Author(s):  
Wooseung Jo ◽  
Tae-Hyun Kim ◽  
Kwang-Nam Choi ◽  
Nam Gyu Kang
Keyword(s):  
Water Supply ◽  
Monitoring Method ◽  
Block System

scholarly journals Growth rates of icicles

1994 ◽  
Vol 40 (135) ◽  
pp. 319-326 ◽  
Author(s):  
N. Maeno ◽  
L. Makkonen ◽  
K. Nishimura ◽  
K. Kosugi ◽  
T. Takahashi
Keyword(s):  
Growth Rate ◽  
Wind Speed ◽  
Water Supply ◽  
Growth Rates ◽  
Water Drop ◽  
Water Film ◽  
Freezing Process ◽  
Diameter Growth ◽  
Supply Rate ◽  
Measured Length

AbstractExperimental and theoretical studies on the growth rate of an icicle were carried out as a function of temperature, water-supply rate and wind speed; the relative humidity was also taken into account. The length of an icicle increases by the downward growth of thin dendritic crystals into the supercooled pendant water drop at the tip, and thus the growth is in the crystallographica-axis direction. The diameter, on the other hand, increases by the freezing of a water film flowing down along the icicle wall. The ratio of measured length-and diameter-growth rates was large, namely 8–32.Both growth rates increased with decreasing temperature and increasing wind speed. The increase in water-supply rate led to the decrease in the length-growth rate but no significant change in the diameter-growth rate. These results could be well described by a numerical model of icicle growth which takes account of the dendritic growth at the tip and the wall and the effective heat transfer within the turbulent boundary layer around the icicle. A formation mechanism of ribs and hollows is discussed in relation to the flowing and freezing process of water on an icicle wall.

scholarly journals Growth rates of icicles

1994 ◽  
Vol 40 (135) ◽  
pp. 319-326 ◽  
Author(s):  
N. Maeno ◽  
L. Makkonen ◽  
K. Nishimura ◽  
K. Kosugi ◽  
T. Takahashi
Keyword(s):  
Growth Rate ◽  
Wind Speed ◽  
Water Supply ◽  
Growth Rates ◽  
Water Drop ◽  
Water Film ◽  
Freezing Process ◽  
Diameter Growth ◽  
Supply Rate ◽  
Measured Length

AbstractExperimental and theoretical studies on the growth rate of an icicle were carried out as a function of temperature, water-supply rate and wind speed; the relative humidity was also taken into account. The length of an icicle increases by the downward growth of thin dendritic crystals into the supercooled pendant water drop at the tip, and thus the growth is in the crystallographic a-axis direction. The diameter, on the other hand, increases by the freezing of a water film flowing down along the icicle wall. The ratio of measured length-and diameter-growth rates was large, namely 8–32.Both growth rates increased with decreasing temperature and increasing wind speed. The increase in water-supply rate led to the decrease in the length-growth rate but no significant change in the diameter-growth rate. These results could be well described by a numerical model of icicle growth which takes account of the dendritic growth at the tip and the wall and the effective heat transfer within the turbulent boundary layer around the icicle. A formation mechanism of ribs and hollows is discussed in relation to the flowing and freezing process of water on an icicle wall.

scholarly journals Determination of Proper Water Supply Rate for Emergency Interconnection Plan

2020 ◽  
Vol 20 (6) ◽  
pp. 159-166
Author(s):  
Suri Kim ◽  
ARin Gim ◽  
Jeongtae Ha ◽  
Hwandon Jun
Keyword(s):  
Customer Satisfaction ◽  
Water Supply ◽  
Local Governments ◽  
Good Practice ◽  
Supply Rate ◽  
Water Service ◽  
Service Interruption ◽  
Emergency Water Supply ◽  
Supply Time ◽  
Supply Water

The deterioration of water supply networks leads to frequent accidents, such as pipe failure, which result in water service interruptions. Depending on the type of accident, a large-scale water service interruption can occur. Therefore, an emergency interconnection plan has been established to prevent interruptions in water service. However, most emergency interconnection plans only consider whether water can be supplied to the region of water service interruption. The area that can actually supply water, emergency water supply area (EWSA), and the possible time required to supply water, emergency water supply time (EWST) are not usually considered. Furthermore, in cases wherein the adjacent local governments or adjacent water supply blocks have insufficient water for the region of water service interruption, it is a good practice to increase the possible water supply time by the reducing the water supply rate (WSR) in order to minimize the damage from the water service interruption. In this study, a method is suggested to determine the proper WSR required to minimize the damage when the amount of emergency water is insufficient. Since it is a case where the amount of emergency water is not sufficient, A-PDA is used to simulate EWSA and EWSA for each WSR. The simulation results are subsequently converted into the customer satisfaction index for each WSR. Through this procedure, the proper WSR can be determined, thereby improving both customer satisfaction and water supply time. Finally, this method is applied to a real water supply network to verify its applicability.

scholarly journals CONTRIBUTION TO THE HYDROCHEMICAL KNOWLEDGE OF AQUIFERS IN THE DEPARTMENT OF TANDJILE-EAST, SOUTHERN CHAD

2021 ◽  
Vol 9 (11) ◽  
pp. 102-110
Author(s):  
Mahamat Nour Abdallah ◽  
◽  
Moussa Abderamane ◽  
Abderamane Hamit ◽  
Adil Bangba Frederic ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Water Supply ◽  
Decision Makers ◽  
Supply Rate ◽  
Groundwater Temperature ◽  
Hydrochemical Parameters ◽  
Literary Journals ◽  
Calcium And Magnesium ◽  
The Republic ◽  
Existing Data

The province of Tandjile is one of the 23 provinces of the Republic of Chad. The drinking water supply rate in this region remains low. Part of the population obtains its water supply through open wells and / or surface water. Climatic and anthropogenic variations in recent years have shown how much groundwater can be influenced both in terms of its quality and its quantity to be used. The objective of this study is to provide knowledge on the state of the hydrodynamic and hydrochemical parameters of the aquifer of the department of Tandjile-Est to help decision-makers in their approach. This study is based mainly on existing data collected in Chadian institutions and literary journals. The analysis of these data showed that the lithology is represented by clayey, sandy, lateritic formations and clay-sandy mixtures. The aquifers are sandy and sandy-clayey. The groundwater temperature values are in equilibrium with those of the air, the pH shows values close to neutrality and the electrical conductivity below standards (Chad, WHO). The groundwater in the study area is not very mineralized and the concentrations of elements indicating contamination (nitrates, chloride, etc.) are clearly in traces. Chemical analyzes revealed two chemical facies: calcium and magnesium bicarbonate and sodium and / or potassium bicarbonate.

scholarly journals SELECTION OF THE CONSTRICTION FACTOR FOR VENUS FLYTRAP OPTIMIZATION

2021 ◽  
Vol 56 (5) ◽  
pp. 595-600
Author(s):  
Amany A. Naim ◽  
Neveen I. Ghali
Keyword(s):  
Water Supply ◽  
Optimal Parameter ◽  
Supply Rate ◽  
Venus Flytrap ◽  
Constriction Factor ◽  
Parameter Values ◽  
Selection Of

This paper proposes venus flytrap optimization (VFO) with constriction factor (VFO-CF) for improving the convergence of the algorithm. The constriction factor has a significant impact on the performance of VFO-CF; its impact was inspected based on benchmark functions. Herein, the property of the constriction factor and the guidelines for determining the optimal parameter values are defined. The proposed method is tested on benchmark functions, and the obtained results are compared with existing VFO results. The water supply rate is tested in the range [4.1, 4.2], which is generally reasonable for the benchmark functions.

Enumeration and Identification of Asbestos Fibres in Water

1974 ◽  
Vol 32 ◽  
pp. 526-527 ◽  
Author(s):  
O. Mudroch ◽  
J. R. Kramer
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Drainage Basin ◽  
Lake Superior ◽  
Research Work ◽  
List Type ◽  
The West ◽  
Asbestos Fibre ◽  
Amphibole Asbestos

Approximately 60,000 tons per day of waste from taconite mining, tailing, are added to the west arm of Lake Superior at Silver Bay. Tailings contain nearly the same amount of quartz and amphibole asbestos, cummingtonite and actinolite in fibrous form. Cummingtonite fibres from 0.01μm in length have been found in the water supply for Minnesota municipalities.The purpose of the research work was to develop a method for asbestos fibre counts and identification in water and apply it for the enumeration of fibres in water samples collected(a) at various stations in Lake Superior at two depth: lm and at the bottom.(b) from various rivers in Lake Superior Drainage Basin.

Bacterial biofilm behavior in water-supply lines of dental units

1992 ◽  
Vol 50 (1) ◽  
pp. 882-883
Author(s):  
B.D. Tall ◽  
K.S. George ◽  
R. T. Gray ◽  
H.N. Williams
Keyword(s):  
Water Supply ◽  
Medical Devices ◽  
Biofilm Formation ◽  
Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

Sign in / Sign up

Export Citation Format

Share Document